<template>
    <div class="home-container">

        <el-container class="home-container">
            <!-- 页面头部 -->
            <el-header>
                <div>
                    <img src="../assets/heima.png">
                    <span>三元管理系统</span>
                </div>
                <el-button type="info" @click="logout">退出</el-button>
            </el-header>

            <!-- 页面主体 -->
            <el-container>

                <!-- 页面侧边栏 -->
                <el-aside :width="isCollapse ? '64px' : '200px'">

                    <div class="toggle-button" @click="toggleCollapse">|||</div>

                    <el-menu background-color="#545c64" text-color="#fff" :unique-opened="true" :collapse="isCollapse"
                        :collapse-transition="false" router :default-active="activePath">

                        <!-- 一级菜单 -->
                        <el-submenu :index="item.id+''" v-for="item in menulist" :key="item.id"
                            active-text-color="#eeefff">
                            <!-- 一级菜单模板 -->
                            <template slot="title">
                                <!-- 一级菜单图标 -->
                                <i :class="iconsObj[item.id]"></i>
                                <!-- 一级菜单文本 -->
                                <span slot="title">{{item.authName}}</span>
                            </template>

                            <!-- 二级菜单文本 -->
                            <el-menu-item :index="'/'+subItem.path" v-for="subItem in item.children" :key="subItem.id"
                                active-text-color="#eeefff" @click="saveNavStatus('/'+subItem.path)">
                                <template slot="title">
                                    <!-- 二级菜单图标 -->
                                    <i class="el-icon-menu"></i>
                                    <!-- 二级菜单文本 -->
                                    <span slot="title">{{subItem.authName}}</span>
                                </template>
                            </el-menu-item>

                        </el-submenu>
                    </el-menu>
                </el-aside>


                <!-- 页面右侧 -->
                <el-main>
                    <router-view></router-view>
                </el-main>

            </el-container>
        </el-container>
    </div>
</template>

<script>
    export default {
        created() {
            this.getMenuList();
            this.activePath = window.sessionStorage.getItem('activePath')
        },
        data() {
            return {
                menulist: [],
                iconsObj: {
                    '125': 'iconfont icon-user',
                    '103': 'iconfont icon-tijikongjian',
                    '101': 'iconfont icon-shangpin',
                    '102': 'iconfont icon-danju',
                    '145': 'iconfont icon-baobiao'
                },
                isCollapse: false,
                //被激活的菜单地址
                activePath: ''
            };
        },
        methods: {
            logout: function () {
                window.sessionStorage.clear()
                this.$router.push('/login')
            },
            async getMenuList() {
                const { data: res } = await this.$http.get('menus')
                // console.log(res)

                if (res.meta.status !== 200) {
                    return this.$message.error(res.meta.msg)
                }

                this.menulist = res.data
            },
            // 点击按钮，切换菜单的折叠与展开
            toggleCollapse() {
                this.isCollapse = !this.isCollapse
            },
            saveNavStatus(activePath) {
                window.sessionStorage.setItem('activePath', activePath)
                this.activePath = activePath
            }

        }
    }
</script>

<style lang="less" scoped>
    .home-container {
        height: 100%;
    }

    .el-header {
        background-color: darkslategray;
        display: flex;
        justify-content: space-between;
        padding-left: 0px;
        align-items: center;
        color: #fff;
        font-size: 20px;

        >div {
            display: flex;
            align-items: center;

            span {
                margin-left: 15px;
            }
        }
    }

    .el-aside {
        background-color: gray;

        .el-menu {
            border-right: none;
        }
    }

    .el-main {
        background-color: lightcyan;
    }

    .iconfont {
        margin-right: 10px;
    }

    .toggle-button {
        background-color: gray;
        font-size: 10px;
        line-height: 40px;
        color: #fff;
        text-align: center;
        letter-spacing: 0.2em;
        cursor: pointer;

    }
</style>